IPVS: one-packet scheduling

Allow one-packet scheduling for UDP connections. When the fwmark-based or
normal virtual service is marked with '-o' or '--ops' options all
connections are created only to schedule one packet. Useful to schedule UDP
packets from same client port to different real servers. Recommended with
RR or WRR schedulers (the connections are not visible with ipvsadm -L).

Signed-off-by: Nick Chalk <nick@loadbalancer.org>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/ip_vs.h b/include/linux/ip_vs.h
index dfc170362842..9708de265bb1 100644
--- a/include/linux/ip_vs.h
+++ b/include/linux/ip_vs.h
@@ -19,6 +19,7 @@
  */
 #define IP_VS_SVC_F_PERSISTENT  0x0001          /* persistent port */
 #define IP_VS_SVC_F_HASHED      0x0002          /* hashed entry */
+#define IP_VS_SVC_F_ONEPACKET   0x0004          /* one-packet scheduling */
 
 /*
  *      Destination Server Flags
@@ -85,6 +86,7 @@
 #define IP_VS_CONN_F_SEQ_MASK   0x0600          /* in/out sequence mask */
 #define IP_VS_CONN_F_NO_CPORT   0x0800          /* no client port set yet */
 #define IP_VS_CONN_F_TEMPLATE   0x1000          /* template, not connection */
+#define IP_VS_CONN_F_ONE_PACKET 0x2000          /* forward only one packet */
 
 #define IP_VS_SCHEDNAME_MAXLEN  16
 #define IP_VS_IFNAME_MAXLEN     16